|The 7th Guest - Malorie|
The 7th Guest was an early CD-ROM game for the PC, released in April 1993. I personally wouldn't consider it a 'horror game', but a creepy and atmospheric puzzle/adventure game. The gameplay generally involves exploring, finding clues, solving puzzles, being subjected to puns, and putting together the mystery of what happened in the mansion. Although it's a pretty famous title, I consider it greatly underappreciated...
Keywords: let's play; malorie; the 7th guest